ORIGINAL: jeffie8696
There is no problem with the cylinder that I can see which surprises me since the chrome plating on the piston should tear up the softer aluminum bore. It is almost as if the piston never got plated or something. Has anyone else had this problem?
Are you saying that these engines have a chrome plated piston and an unplated bore?
If the bore isn't anodized then that's crazy metalurgy.
Most AAC engines have a plated bore and unplated piston.
Some, like the Norvels, have a nickel-plated piston running in an anodized aluminum bore which is pretty good (and long-lasting).
Aluminum on aluminum will gall-up in no time unless one of the surfaces is anodized or plated in some way.